// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

#pragma once

#include <nebula/types/type_fwd.h>

namespace nebula::internal {

    std::unordered_multimap<std::string, int> create_name_to_index_map(
            const FieldVector &fields);


    template<int NotFoundValue = -1, int DuplicateFoundValue = -1>
    inline int lookup_name_index(const std::unordered_multimap<std::string, int> &name_to_index,
                        const std::string &name) {
        auto p = name_to_index.equal_range(name);
        auto it = p.first;
        if (it == p.second) {
            // Not found
            return NotFoundValue;
        }
        auto index = it->second;
        if (++it != p.second) {
            // Duplicate field name
            return DuplicateFoundValue;
        }
        return index;
    }

    void append_metadata_finger_print(const KeyValueMetadata &metadata,
                                   std::stringstream *ss);
}  // nebula::internal
